That makes sense, ksu. Thanks!

To be clear, flying from MUC to NUE (rather than taking the train) would be the height of stupidity...just don't do it. The Christmas markets in Munich are perfectly nice.

If you're not already planning it (a bit unclear from your post), I highly suggest going to the NUE christmas market as well. Arguably my favorite (although Rothenburg is a pretty close second). It's about a 5 minute walk from the NUE Hbf.

Walking distance is about a kilometre. Google Maps suggests 12 minutes walking time through the pedestrianized zone. With the amount of people in the area at Christkindlesmarkt time (even after the horrible attack in Berlin) 15-20 minutes is more likely.

Not a big fan of Nürnberg Christmasmarket as there are mostly 3 different and more or less identical types of stalls: Sausages, Erzgebirgs-sttuff and sweets. This year it seams at most markets that 80 % of the offers are identical. If you visit Munich and have easy access to the Nürnberg market do it as well. Otherwise skip it, it´s not worth a journey.

P.S. I guess you already traveled, right?

Inbdeed. People who book it should (and will;)) pay moron-tax:D